.dashboard-container {
    max-width: 900px;
    margin: 40px auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  }
  
  .tab-bar {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 20px;
  }
  
  .tab-bar button {
    padding: 10px 20px;
    border: none;
    border-radius: 20px;
    background-color: #e0e0e0;
    cursor: pointer;
    transition: 0.3s;
  }
  
  .tab-bar .active {
    background-color: #4a90e2;
    color: white;
  }
  
  .history-table {
    width: 100%;
    border-collapse: collapse;
  }
  
  .history-table th,
  .history-table td {
    border: 1px solid #ddd;
    padding: 12px;
    text-align: left;
  }
  
  .history-table th {
    background-color: #4a90e2;
    color: white;
  }
  